997251892 has 48 divisors (see below), whose sum is σ = 2274289920. Its totient is φ = 371308032.

The previous prime is 997251847. The next prime is 997251929. The reversal of 997251892 is 298152799.

It is a super-2 number, since 2×997251892² = 1989022672195159328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74392 + ... + 86767.

It is an arithmetic number, because the mean of its divisors is an integer number (47381040).

Almost surely, 2^997251892 is an apocalyptic number.

It is an amenable number.

997251892 is an abundant number, since it is smaller than the sum of its proper divisors (1277038028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997251892 is a wasteful number, since it uses less digits than its factorization.

997251892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161200 (or 161198 counting only the distinct ones).

The product of its digits is 816480, while the sum is 52.

The square root of 997251892 is about 31579.2953056271. The cubic root of 997251892 is about 999.0831235946.

It can be divided in two parts, 99725189 and 2, that multiplied together give a triangular number (199450378 = T₁₉₉₇₂).

The spelling of 997251892 in words is "nine hundred ninety-seven million, two hundred fifty-one thousand, eight hundred ninety-two".